Belt tensioning device, drive belt arrangement comprising such a device and internal combustion engine for a vehicle comprising such an arrangement

摘要

The pulley tensioner comprises a roller support (17) on the belt (3) and a spiral return spring (33) which ensures a pre-constraint on the support. The roller support has an elastomer coating band (37) for absorbing vibrations, which has a thickness of between 1 mm and 10 mm and a hardness of between 30 Shore A and 95 Shore A. A hydraulic shock absorbing circuit varies the length of the tensioner body (21).